I dont know why my python retcode=10013

 

I am using python with Mt5 and testing with Demo account

This is my Close Request Data- >> Req: {'action': 1, 'symbol': 'GOLD#', 'volume': 0.24, 'type': 0, 'position': 933862679, 'price': 1919.2, 'deviation': 20, 'magic': 234000, 'comment': 'DD', 'type_time': 0, 'type_filling': 1}

And this is a responde  ::OrderSendResult(retcode=10013, deal=0, order=0, volume=0.0, price=0.0, bid=0.0, ask=0.0, comment='Invalid request', request_id=0, retcode_external=0, request=TradeRequest(action=1, magic=234000, order=0, symbol='GOLD#', volume=0.24, price=1919.2, stoplimit=0.0, sl=0.0, tp=0.0, deviation=20, type=0, type_filling=1, type_time=0, expiration=0, comment='DD', position=933862679, position_by=0))

it happened sometime then I can not to find the root problem to fix

Please help me, Thank you.